STRUCTURE OF CORNER COVER

PROBLEM TO BE SOLVED: To provide a structure which can ensure the water tight performance of a joined part. SOLUTION: The back surfaces of a pair of band plates 3 arranged so as to be a L letter shape section are mutually integrated connectingly by a connection hardware 4 and also at least one side of the back surface edge parts of a pair of band plate positioned on a back surface crossing part is lost and a water tight material 5 is filled in the groove 6 formed by this loss. Thereby, as at least one side of the back surface edge part of the band plate positioned on the back surface crossing part of a pair of band plates 3 mutually integrated connectingly is lost and the water tight material 5 is filled in the groove 6 formed by this loss, even if a clearance δ is generated on the corner by the machining accuracy of the joined surface of a pair of band plates 3 and the warp of the band plate 3, the clearance is perfectly sealed by the water tight material 5 filled in the groove 6. In other words, by filling up the water tight material 5 filled in the groove 6, the clearance δ can be buried in the range of the size (t) of the water tight material 5 of the direction orthogonally crossing with the joined surface 3a of the band plate 3 and then the water tightness is garanteed.